MONDAY, FEBRUARY 2

"GOSSIP GIRL" - (8:00-9:00 p.m. ET)

"Carnal Knowledge" (CONTENT RATING TBD) (HDTV)

BLAIR IS IN THE MOOD FOR A LITTLE REVENGE - In retaliation for not playing by the unspoken rules of Constance Billard, Blair (Leighton Meester) hatches a plan to bring down her teacher, Rachel (guest star Laura Breckenridge), and it's going to be good. After Chuck (Ed Westwick) wakes up in a hotel and only has a minor recollection of what happened the previous evening and who he spent the evening with, Nate (Chace Crawford) and Vanessa (Jessica Szohr) try to help him fill in the missing pieces of what is turning out to be an increasingly intriguing mystery. Blake Lively, Penn Badgley, Taylor Momsen, Kelly Rutherford and Matthew Settle also star. Liz Allen directed the episode written by Alexandra McNally & Lenn K. Rosenfeld (#217).